online trend window
some of the applications monitoring need to have online trends
and this function is available in freelance , but the problem i have faced on this
if you change ot other screen you come back to trend window screen and it is showing starting again, not keep ongoing ??!!
how you can change betwwen the screen and keep trend window working when you come back to the trend window screen
If I didnot understand wrong, you are trying to monitor online values not, logged datas.
If you want to keep datas when you switch the screens, you have to define trend server and log these datas.
For more details, please visit below link:
In Freelance Operation - DigiVis use can see trends via two options (i) via trend window (ii) via trend display
In trend window values are not logged/archived hence it show current values upto last 30s by default. Whereas if you want see continuous trend with previous values then use trend display where you need to use trend block and define archive duration.
Also check timesynch is enabled and controller and freelance operator stations are in timesynch.
Please note that trend server is for free trend selection and free trends are not archived. user need extra license for that in production environment. so in your case you don't need trend server but need to use trend block and see trend via trend display.
Hope that helps...